I have started using a ball machine to uniformly toss balls at me to practice my swing. This has been useful in just practicing one after the other. It has also been interesting to be able to manipulate each individual shot on the machine itself and has given me a better understanding of the variables and characteristics the ball can have. I have been able to improve my serve over this time and am able to get the ball into the box most of the time. Now just to make the serve a little faster.